33. Nobody answered the phone in the company when I called. They____________ .
(A) must leave
(B) should leave
(C) were leaving
(D) must have left.

答案：登入後查看
統計： A(18), B(4), C(9), D(107), E(0) #3105481

詳解 (共 1 筆)

#5825786
must + 原形動詞: 對「現在」事實...
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